diff --git a/unittests/pair.chai b/unittests/pair.chai
new file mode 100644
index 0000000..9b3c804
--- /dev/null
+++ b/unittests/pair.chai
@@ -0,0 +1,5 @@
+var p = Pair("Hello", "World")
+
+assert_equal(p.first, "Hello")
+assert_equal(p.second, "World")
+